David Samuel Cohen, known professionally as David X. Cohen, is an executive producer, show runner and writer for Futurama. Known previously as David S. Cohen, he started his career as a writer on Beavis and Butt-head and later joined the writing staff of The Simpsons as a writer, story editor, and producer from 1993 until 1998.

While working on The Simpsons, Cohen was approached by Matt Groening to help develop Futurama. Although usually not credited, he is responsible for "perfecting" most of the scripts for each episode. He also wrote the music for "Molten Boron", and designed one of the robots in the robot strip club.

While developing Futurama in 1998, primetime animated television shows in the United States became eligible to unionize with the Writers Guild of America. Because Guild rules state that no two members may have the same name and there was already someone registered with the name David S. Cohen, he changed his middle initial. He chose the "X" because it sounded more science-fictiony.